Means for cooling the supply-passage of gas-turbines.



No. 878,130. PATENTED FEB. 4, 1908.

v J. W. 25. ELLING.

MEANS FOR COOLING THE SUPPLY PASSAGE 0F GAS TURBINBS.

2 SHEETS-SHEET 1.

APPLIGATION FILBD AUG. 18, 1904.

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No. 878,180. PATENTED FEB. 4, 1908.

J. W. E. ELLING.

MEANS FOR COOLING THB SUPPLY PASSAGE OF GAS TURBINES.

APPLIOATION FILED AUG.1B,.1904.

2 SHEETS-SHEET 2.

I77V/Z'ZILG4S'JQBAJV- I Inrzerqtor: g, amw a 'd w JENS WILLIAM EGIDIUSELLING, OF CHRISTIANIA, NORWAY.

MEANS FOR COOLING THE SUPPLY-PASSAGE OF GAS-TURBINES.

Specification of Letters Patent.

Patented Feb. 4:, 1908.

Application filed August 18. 1904. Serial No. 221,274.

' bines, of which the following is aspecification.

The use of combustion gases as a motive fluid for turbines has alwaysbeen dependent upon effective cooling means as the heat to which theturbine is subjected is far greater than any material, practical for usein constructing the turbine, can stand. The part requiring greatestprotection in this respect is the main passage or conduit connecting thefurnace with the turbine, the walls thereof being continually exposed tothe heat of the gases direct from the furnace, which gases are at anexcessively high temperature. The problem presented in constructing aconduit or passage of this character is to provide walls thick enough towithstand internal pressure and thin enough to afford properconductivity of heat therefrom by the cooling medium.

To this end the invention seeks to provide pressure on the exterior ofthe conduit wall at all times equal to the internal pressure thereon sothat such a wall may be made as thin as it is structurally practical tomake it to afford the greatest degree of conductivity without risk ofdistortion from internal pressure.

It is a further object of this invention to so control the externalpressure that it will always be substantially equal to any variation ofinternal pressure.

WVith the foregoing objects in view the invention consists in jacketingthe conduit or main gas supply passage and filling said jacket with acooling medium preferably boiling water and providing a steam space, ata point above the conduit connected with the combustion chamber of thefurnace, the varying or constant pressure of the combustion chamberbeing communicated direct to the liquid and therethrough to the conduitwall.

trated on the appended drawings.

Figure 1 represents one half of supply passage of a gas turbine partlyin elevation and An embodiment of my invention is illus-, j

partly in section on the line 11 in Fig. 2. F ig. 2 shows thearrangement of the supply passage combined with water reservoir and pipeconnections to the cooling jacket, showing section of supply passage onthe line22 in Fig. 1. Fig. 3 is plan view of the supply passage showingsectional cut on the line 33 in Fig. 1. Fig. 4 is the same view showingpart of the turbine wheel and exhaust passage for the gases inhorizontal section. Fig. 5 shows the supply passage and cooling jacketconnected with 'a furnace.

The supply passage comprises the conduit a for the furnace gases and theguide vanes b. The conduit a is at the end opposite the guide vanes band is in direct communication with the combustion chamber A of thefurnace. A jacket d for the circulation of the cooling agent is arrangedto inclose the passage or conduit a and also surround the guideapparatus b. For convenience the supply passage and its jacket is madein two parts (Z, (1, said parts being connected through pipes c, c witha reservoir f, which as shown is provided with a water gage. Thegenerated steam is conducted through a pipe 9 from the said reservoir toany convenient place, for instance to the furnace for the abovementionedpurpose. The circulating fluid is conducted through a pipe h from thereservoir f to the lower end of the acket (Z, d.

j is a mud box interposed between the pipe h and the jacket d, cl forthe purpose of gathering mud or other impurities. The direction in whichthe cooling agent travels is shown by the arrows. may be maintained inthe ordinary way by means of a feed pump.

I claim:

The combination of a gas turbine, a furnace, a gas supply conduitcommunicating" with said gas turbine and furnace, a jacket adapted tocontain a cooling medium surrounding said conduit, and meansto maintainapproximately the same pressure in the jacket as in the conduit,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JENS WILLIAM EGIDIUS ELLING.

l/Vitnesses:

N. G. TAUDBERG, HENRY BORDEWIOH.

The water level in the tank f

